Expanded metal.



N. E. CLARK. EXPANDED METAL.

APPLICATION FILED MA Y 20,-1908.

Patented Feb. 3, 1914. 1 2 1 6 F I; 1\ 4 2 3 L15 17 I3 17 \IS terial showing the arrangement STATES PATENT OFFICE.

uoimrs nnnronn CLARK, or PLAINVILLE, CONNECTICUT.

EXPANDED METAL.

Specification of Letters Patent.

, Patented Feb. 3,1914.

Application filed May 20, 1908. Serial No. 433,923.

To all whom it may concern:

Be it known that I, Noiuus ELMORE CLARK, a citizen of the United States, and resident of Plainville, in the county of Hartford and State of Connecticut, have invented'certain new and useful Improvements in Expanded Metal, of which the following is a specification.

My invention relates to improvements in ex anded metal fabrics.

Thvmain object is to provide a strong fabric which can be manufactured economically. One of the principal "uses of such a fabric is as concrete reinforcement.

' One of my objects is to provide a fabric having longitudinal tension members connected by strands.

The accompanying single sheet of drawings illustrates two forms of the invention which will be more fully described and claimed hereinafter.

Figure l, is a plan view of apiece of mapreparatory to expansion. Fig. 2, shows the same stretched or expanded. Fig. 3, shows a modification of slitting. Fig. 4, shows a portion of the stock of Fig. 3 expanded. Fig. 5, is a-fragmentary sectional view of a bar and attached strands.

The fabric maybe of any width and contain any number of bars, two or more such as 1, 2 and 3. These may be of any crosssectional shape and size.

Adjacent bars'are integrally connected by a series of members each of which is made up of at least three strands such as 4, 5 and 6. The alternate connectors extend-at opposite inclinations, the strands 7, '8 and. 9 1n the drawing being inclined upward and to the left while strands 4, 5 and 6 are innectors 10 and 11 are. arranged so as to form the remaining sides of. a diamond Evhich is divided across one diameter by the The slitting preparatory to expansion is along lines parallel to the bars andin staggered relation, the pairs of slits such as12 and 13 alternating with slitssuch as 14 and 15. The bonds between the slits in the row of slits 14 are cut as at 16 and the bonds between the slits in the row of slits 13' are cut as at 1 7. The slitting between the bars 2 and 3 is symmetrical withthe slitting be tween bars 1 and 2 so that the product'shown of slitting:

the right. The I conin Fig. 2 is symmetrical about the axis'of The slitting of Fig. 3 omits the bar 2 so that the fabric of Fig. 4 results. Here the connectors form a diamond without any cross bar.

In the drawings I have shown the strands on edge re'lativeto the-plane of the fabric.

The exact angle is unimportant. The bars. may also be on edge or inclined as in Fig. 5 if desired- The slitted stock may be stretched or expanded in any suitable manner. Preferably lugs such'as 18, 19, 20 and 21 are lefnwhich serve as anchors to prevent transverse slip ping in concrete when so used. The method 5 of manufacture is simple and when properly conducted does not injure the material.

The strands being on edge give great stiffness to the fabric gage stock.

What I claim is: U 1. An expanded metal fabric consisting of parallel bars connected by ties, successive ties being spaced apart inclined in opposite directions and each tie consisting of three strands connected by anchor portions, the" ties at the points of connection with the bars being bent at acute angles bars. p r

2. Ali expanded metal fabric consisting of substantially parallel bars and oppositely inclined integral connectors each comprising 'at least three strands arranged on edge and anchors at the points of connectionof the strands, the ties at the'points of connection ative to the bars.

3. An expanded metal fabric consisting of L parallel bars connected by zig-zag ties, each tie being bent at an acute angle at its points of connection with the bars and consisting of at least three strands with anchors at the junction of the individual strands, some'of the anchors pointing in one direction and others in the opposite direction. 4. An

rising longitudinally extending parallel are and an integrally connecting slitted portion having a plurality of rows of Iongitudinal slits parallel to said barsv and arranged in staggered relation, the metal between the ends of the slits in one row being substantially opposite the center of the slits 1n the adjacent rows and slitted transversely relative to the with the bars being bent at acute angles relexpandedmetal fabric blank com- I weeps? relative to said portions mid-way between 1 successive rows being in relatively stagthe longitudinal slits forming extensible zi'ggerecl arrangement and the metal between zag strips connecting said bars. said bars being slitted transversely relative 5. An expanded metal fabric blank comto said bars so as to form extensible zigzag 5 prising longitudinally extending parallel strips connecting said bars, each strip con- 15 bars and an integrally connecting slitted 'sisting of three strands."

portion having four rows of longitudinal NORRIS ELMORE CLARK. slits parallel to said bars, the length of said Witnesses: slits being very materially greater than the MARCUS M. SGHENK,

' 10' distance between said slits and the slits in Rom. S. ALLYN. 

